GSM GPRS RTU Telemetry Data Logger
The S240 GSM GPRS RTU Telemetry Data Logger is a low cost M2Mdata logger and
universal GSM GPRS Engine which can transmit and receive analog, digital and pulse counter
inputs and PLC or metering data and send this data to any device connected to the
GSM/GPRS network such as mobile phones, Web Servers, monitoring centers, control rooms
or web based SCADA packages
Features:
 Quad-band Siemens MC55i GPRS Module and High-density performance line ARM 32-bit
MCU inside;
 Direct connection to the GSM GPRS Network;
 Transparent Serial Data Tunneling using low cost SMS/GPRS network;
 Remote Configuration by SMS Messages or GPRS;
 Upload data via GPRS or SMS on Schedule or event occurence;
 Supports Dynamic Domain name or Static IP address;
 Supports SMS, GPRS UDP and TCP protocols;
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 Supports Modbus RTU protocols;
 1USB Port, 1 RS232 Serial Port, and 1 RS485 Serial Port;
 6 Opto-isolated digital inputs can be programmed to NC/NO/Edge/Level type by DIP switch.
Passive Contact Type and Active Contact (3~24VDC) type can be programmed by DIP
switch, DIN1 and DIN2 are Completely isolated. when alarm occurs the unit can send Alarm
Messages by SMS or GPRS or auto dial the preset phone numbers;
 6 digital inputs can be used as Pulse Counters;
 4 Digital Relay Outputs can be programmed to switch on & off by phone call or SMS, or by
linking to inputs alarms;
 10 Analog Inputs. (12 bit resolution, 0-5V or 0-20mA);
 2 Thermometer Inputs for DS18B20, measures temperatures from -55°C to +125°C, ±0.5°C
accuracy from -10°C to +85°C, Thermometer resolution is programmable from 9 to 12 bits;
 4 Power Source Outputs for external devices, like Thermometer or transducer, 3 with
3.3V@400mA, another with 12VDC@750mA;
 Supports 1 SMS Center Number and 1 IP address or 1 Dynamic Domain name;
 MTBF(Mean Time Between Failure) up to 2Years;
 User friendly PC Programming Interface, it can remotely program the S240 as well as
upload the data from the S240 by SMS or GPRS, all of the Current Value or status of the
S240 can be displayed directly, and it will also display the SMS Command details while you
program the unit;
 More Protocols can be updated by user through USB Port with the latest firmware;
 Power supply 9V to 24V(Recommend 12VDC).
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RS-232 Interface
Relay Output
Analog/Digital Inputs
RS-485 Interface
Watchdog
GSM/GPRS
Engine
STM
Industrial MCU
Power
management
Battery
Audio
management
US
B
Int
erf
ac
e
DC Input
Temperature
Sensor
Specifications of GPRS RTU:
Parameter Item
DC Power supply
Power consumption
GPRS Module
Frequency bands
Reference Scope
Standard adapter: DC 12V/1.5A Reference scope 9-24V DC
Standby:12V/70mA; Working Max.: 12V/300mA
Siemens MC55i
Quad-band: EGSM 850,EGSM900, GSM 1800, GSM 1900,
Transmit power
Compliant to GSM Phase 2/2+
Class 4 (2W) at EGSM 900 and EGSM 850; Class 1 (1W) at GSM
GPRS connectivity
GPRS Data
1800 and GSM 1900
GPRS multi-slot class 10
GPRS data downlink transfer: max. 85.6 kbps; GPRS data uplink
Transmission
TCP/IP stack
SIM interface
External antenna
transfer: max. 42.8 kbps.
TCP,UDP
Supports 3V SIM Card
Connected via 50 Ohm antenna connector or antenna pad, SMA
Serial Interfaces
Protocols
Antenna interface
1 RS-232 Port,1 RS485 Port, 1 USB Port;
SMS, GPRS UDP, TCP, Modbus RTU, and more equipment
Digital Inputs
protocols can be added according to requirements.
6 OPT Coupler (Active Contact 3-24V);NC/NO/Edge/Level type;
Active Contact and Passive Contact Selected By DIP Switch; Can
be used as Pulse Counters;
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Analog Inputs
Thermometer Inputs
10 Analog Inputs. 12 bit resolution, 0-5V or 0-20mA;
2 Ports DS18B20, Measures temperatures from -55°C to +125°C.
±0.5°C accuracy from -10°C to +85°C, Thermometer resolution is
Digital Relay Outputs
12 bits.
4, 120VAC/3A, 24VDC 3A, Can be controlled by Event, scheme,
Incoming call, SMS Commands, Timer, Interlock; 2 outputs can
Power Source Outputs
setup as NC or NO type;
3 Ports with 3.3VDC/400mA Power for external device; 1 Port
with 12VDC/750mA Power for external device;
Internal Backup Battery 7.2v 1200mAH
Work Temperature range -10-+70 °C
Humidity range
Relative humidity 95% (condensation free)
Exterior dimension
168mm*113mm*32.3mm
Net Weight
1000 g
Standard Package list:
S240 GSM/GPRS RTU X 1
Power supply adapter X 1 (12V 1.5A 1)
USB cable for communication X 1
CD (PC Configurator and User Manual) X 1
GSM Antenna X 1
Monitoring Center or OPC Server or SCADA:
1. Directly to SCADA System
If you want to log data to an existing SCADA system directly, you must develop the
GSM/GPRS Driver then install it in the SCADA according to our communication protocols, the
communication protocols are outlined in the Appendix. The schematic is as below:
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2. Monitoring by SCADA System through OPC Server
If you want to log data to an existing SCADA package through an OPC Server, you should
develop the GSM/GPRS Driver then install it in the OPC Server according to our
communication protocols, so that the OPC Clients can access the GSM/GPRS RTU through
the OPC Server. The communication protocols are in the appendix. The schematic is as
below:
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3. By customer customization monitoring center
If you want to log data to a custom monitoring center, you need to develop the GSM/GPRS
Driver then install it in the monitoring center software according to our communication
protocols. The communication protocols are in the appendix. The schematic is as below
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4. By Mobile phone through SMS.
The GSM/GPRS RTU can send reports and events by SMS to 1 SMS Center number and 6
user numbers.
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